notched bar toughness

• 缺口韧性

notched bar toughness的用法和样例：

例句

1. Polypropylene shows a high mechanical strength, tensile strength, but a low notched impact strength, PP resists stress cracking and it is easy to weld.
   聚丙烯具有高刚性，高硬度和高强度，但缺口冲击韧性一般。